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Why does CT utilise compton scattering?

  1. Dec 10, 2011 #1
    why does conventional xray imaging utilise photoelectric effect but ct utilise compton scattering? i know that at different energies, different mechanisms (eg compton scattering, photoeletric effect, pair production) dominate but do they not chose the energy beam to correspond the process that they want - i know they harden the beam (ie get rid of low energy photons) for example

  2. jcsd
  3. Dec 10, 2011 #2


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    Science Advisor

    The point you are making is correct. Compton scattering is the dominant process for higher energy (~ 1 Mev or high kev) for photons.
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